Collocations for compartment - noun

first-class, second-class
non-smoking, smoking
baggage (esp. AmE), luggage (esp. BrE)
driver's, passenger
sleeping

in a/the compartment

separate
hidden, secret
battery, freezer, glove, storage
Your sunglasses are in the glove compartment.

overhead
watertight

be divided into
The case is divided into four separate compartments.

in a/the compartment